Journal article
The role of solvent vapor annealing in highly efficient air-processed small molecule solar cells
K Sun, Z Xiao, E Hanssen, MFG Klein, HH Dam, M Pfaff, D Gerthsen, WWH Wong, DJ Jones
Journal of Materials Chemistry A | Published : 2014
DOI: 10.1039/c4ta01125b
Abstract
We demonstrate highly-efficient, solution-processed small molecule solar cells with the best power conversion efficiency (PCE) of more than 5%. The active layer consists of a diketopyrrolopyrrole-based donor molecule (DPP(TBFu)2) and a fullerene derivative (PC71BM) that is spin cast and subsequently treated with solvent vapor annealing (SVA) in air. We find not all solvent vapors lead to the best PCE. Solvents of high vapor pressures and medium donor solubilities, such as tetrahydrofuran or carbon disulfide, are most suitable for SVA in the context of organic solar cell application. On the other hand, acceptor solubility plays an insignificant role in such a treatment. An active layer treate..
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Grants
Awarded by Australian Renewable Energy Agency (ARENA) through Australia-Germany Research Exchange Project Grant
Awarded by ARENA
Funding Acknowledgements
We thank Australian Renewable Energy Agency (ARENA) for supporting this work through the Australia-Germany Research Exchange Project Grant (1-GER001) and the Victorian Organic Solar Cell consortium (VICOSC) with funding provided by the Victorian State Government Department of Primary Industries (Energy Technology Innovation Strategy), the Victorian State Government Department of Business Innovation (Victorian Science Agenda) and ARENA (Project 2-A018). W. W. H. Wong thanks the fellowship sponsored by ARENA. The authors are grateful to Prof. Andrew B. Holmes at the University of Melbourne and Dr Alexander Colsmann at the Karlsruhe Institute of Technology for in-depth discussions and kind support.